Improvement in pavements



Invamfr Patented Dec. 25, 1877.

Pavement.

.S. E. GROSS.

N.FEER5, PHOTOLITHDGRAPHEH| WASHINGTON. D. C.

. Lroall whom "it ayvlcoomern: y

l 1' Be 1 it .known-that I, SAMUEL Guess, of 'Chicago, insthecountyof Cook and State of 'Illinois, haveyinvented a newand useful Imi. provementjin Baveirients, which` iis VVfully set forth in the following 'speciication'and accomlranyille drawings z 1 ,Figure .1 ai longitudinal vertical section Lof; one formof mypayement; and`Fig. 2 is a ylongitudinal vertical section of a modification [ofthe same. `f f Iteferringflto.l he-Jdfrawings, A designates in 1 all theiiguresznatural stone slabs or nag-stones, on which the wood, stone, brick, or composite blocks B aire. placed, as shown in Figs. :land 2. u f The objectyof myinvention is to, l furnish a l durable and substantial pavement, Yand it consists ina foundation of natural stone slabs or agstoneswhichare laid `.on aproperly- .i preparedfoundation, and on which wood, stone, brick, @or composite blocks are placed asja top layer-for wearingfsurface, vas shown `inFig. 1, `for as shown irl-Fig; `2,V with interstices between the blocks,'whic maybe fllledwith any;;suit

,fable materialjorfmaterials.

.'.f'I prefer to cause the-blocks y BtcV li'esnugly i ytogether'in parallel'rows across thestreet or roadway; yblitgI, doz-not limit myself to the g f'fo'rm, size',"fand orde'frof arrangementof the blocks B, asjshown ini-,Figs 1 and 2'.V f f'f-Theofou dati'v nffstone may be ofjany, desir- Y required dependsuponpthequality of the stone, `the 'character 'ofthejsub-bed, and the burden of travel. They maybesawed, cut, planed, i or made smooth, or .allowed to retain their if natural surfaces`,-as may be most'desir'able.

. In the construction of my improved pavementI preferto'lay the flag-stones in courses of about threev feetfinwidth, running either K across orlen'gthwisefto the street,vandfupon i a'subv-bed ofsand. Under the flag-stones, and o o. y along wherethe courses break joints, I also i i `:place boards lengthwise, 'adaptedto the desired 4curvature l,oriiiclination of the road-bed. u y The boards enable the nag-stones to-settle uniformly, and, `besides`, they can be so varied in tween two and four inches but the thickness I. Y thickness as to'fenable courses of different W l 4thicknesses of stoneto preserve an even sur- UNrrEn-STATES PATENT OEEIGE.

` ,sjAMUEnEeEossoE onrcAeo, runners, Assrenon rro EMILY enoss, or

" sAME PLACE.

A speincauoaf'oramg pm of Margraten No. 198,606, dated December 25,1871; application filed l 1 g v Apru 1o, 1877.

face with each other. The flag-stones in each course should be as nearly of the same thickness as practicable. Upon the Hag-stones I place asphaltum, sand, einders, cement, or other suitable material in sufficient quantity to remedy any defects of the sub-bed or any inequalities on the surfaces of the nag-stones, and to obtain a more even and smooth bed for the blocks. The blocks forming the top layer vshould be oblong rectangles, preferably about four inches thick, siX inches high, and ten inches long, set in parallel rows, with interstices of about one inch between each row, lled with sand, gravel, or other suitable material; or they may be round or split wood blocks-in this form preferably of cedar-set edgewise to the grain, and the interstices filled with anydesirable material. f

The blocks B may be dipped or impregnated in coal-tar, pitch, or liquid asphaltum prior to laying, so that they will be cemented together, and the joints made water-proof; or the liquid bitumen may be poured in the creviees after the blocks are laid.

By my method of constructing a pavement the natural stone slabs or flag-stones which form the foundation will a'ord a permanent, substantial, and dry base, on which the top layer or wearing-course is placed, and will last for ages, aiiording a foundation for new wearing-surfaces as the old ones decay or are worn out.

Another advantage in my construction is that the pavement can be readily repaired or removed in sections, to allow excavations for water and gas mains.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The combination of the natural plain stone slabs or nag-stones with the blocksB, the whole constructed substantially as described, and for the purpose set forth.

In testimony that I claim the foregoing I have hereunto. set my hand this 7th day of April,

A. D. 1877. SAMUEL E. GROSS.

Witnesses:

J. R. GUs'rER, WM. J. MAnNi-NG. 

